AMERICAN COLKOPTKRA. 147 



than wide, 8 a little shorter still, 9 equal to the four preceding. Prothorax trans- 

 verse us usual, sides nearly straight and a little convergent toward the front, 

 margin moderately reflexed, front angles distinct, hind angles rounded, but 

 much less broadly so than in mollis. Metasternum sparsely punctate, especially 

 posteriorly. Middle coxa? contiguous. Length 2.4-3.6 mm. 



California (Lake Tahoe) ; Arizona (Williams). 

 Described from about a dozen specimens collected by Dr. Fenyes, 

 Barber and Scbwarz, and the author. 



12. E. j>;i 1 1 i I a rsis n. sp. — Very similar in fades and structure to nigrans, 

 but the sexes here seem to differ uniformly in color, all the males seen being 

 black, and all females brown. The prothorax appears to be a little more ample 

 and more distinctly transversely impressed, the sides more rounded, the surface 

 simply punctate. The. metasternum is more densely punctate than in nigrans, 

 and the tarsi are rather less slender, and as a rule more abruptly pale. Pallitarsis 

 is on the whole a rather larger and smoother species and is unique thus far in 

 the different coloration of the sexes. Length 2.8-4.1 mm. 



This species is represented by a good series from the Lake Tahoe 

 region in California; Hood River, Oregon, and Easton, Washington. 



13. E. tristis Lee. — Elongate, black, shining; tibiae picescent. tarsi paler; 

 pubescence sparse and fine. Eyes moderate, front about three times as wide as 

 the longest diameter of the eye, and about four times the width of the eye. An- 

 tennae half as long as the body, joints 2, 3 and 5 about equal in length, the second 

 stouter, as usual ; 4 and 7 a little shorter and subequal, 6 still shorter and only 

 slightly longer than wide ; 8 smallest, as wide as long; 9 a little shorter than the 

 five preceding. Tarsi very slender; sixth ventral not notched or emargiuate. 



Veta Pass, Colorado; a single male specimen in the LeConte 

 collection. 



As compared with nigrans, tristis is much more shining, with 

 smaller less prominent eyes, the seventh antennal joint much longer, 

 about twice as long as wide (not much longer than wide in nigrans) 

 and the ninth joint relatively shorter. The male of pallitarsis is 

 also less shining than tristis, with closer punctuation and strongly 

 transversely impressed prothorax (not at all impressed in tristis) 

 and the eyes are much larger, and the ninth antennal joint longer. 



14. E. moiititnus n.sp.— Elongate, pale brown, simply punctate throughout, 

 pubescence grayish, moderately conspicuous. Eyes very large in the male, the 

 front between them not wider than one and one-half times their diameter; in the 

 female distinctly smaller, the front twice as wide as their vertical diameter. An- 

 tenna? ( % ) with joints 2 and 4 nearly equal in length, the former much thicker 

 and a little longer than wide ; 3 fully one-half longer than 2 or 4, and a little longer 

 than 5 ; 7, 6 and 8 progressively shorter than 4, the latter as wide as long or even 

 slightly transverse; 9 about equal to the six preceding. In the female the rela- 



TRANS. AM. ENT. SOC. XXXI. APRIL, 1905. 



